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A washing machine now costs 204 yuan, 4 / 21 cheaper than the original price. How much is the original price?
（204*21）/（21-4）=252
A washing machine now costs 204 yuan, 21 / 4 cheaper than the original price. How much is the original price
Original price = 204 (1-21 / 4) = 252 yuan
After a 15% discount on the price of a certain washing machine, it's 117 yuan cheaper. What's the original price of this washing machine? The solution of the equation
Let X be the original price,
X - 0.85x = 117 x = 117 / 0.15 = 780 yuan
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